Origins of the Endo and Exo Selectivities in Cyclopropenone, Iminocyclopropene, and Triafulvene Diels-Alder Cycloadditions.
Origins of the Endo and Exo Selectivities in Cyclopropenone, Iminocyclopropene, and Triafulvene Diels-Alder Cycloadditions.
复制标题
DOI:
10.1021/acs.joc.8b00025
复制
发表时间:
2018-03-16
期刊:
影响因子:
--
通讯作者:
Houk KN
中科院分区:
文献类型:
--
作者:
Levandowski BJ;Hamlin TA;Helgeson RC;Bickelhaupt FM;Houk KN
The endo and exo stereoselectivities of Diels—Alder reactions of cyclopropenone, iminocyclopropene, and substituted triafulvenes with butadiene were rationalized using density functional theory calculations. When cyclopropenone is the dienophile, there is a 1.8 kcal/mol preference for the exo cycloaddition with butadiene, while the reaction of 3-difluoro-methylene triafulvene with butadiene favors the endo cycloaddition by 2.8 kcal/mol. The influence of charge transfer and secondary orbital interactions on the stereoselectivity of Diels—Alder reactions involving triafulvenes and heteroanalogs is discussed. The predicted stereoselectivity correlates with both the charge and highest occupied molecular orbital (HOMO) coefficient at the C3 carbon of the triafulvene motif.
登录
查看更多内容
DOI:
10.1002/chem.201706075
发表时间:
2018-04-17
期刊:
Chemistry (Weinheim an der Bergstrasse, Germany)
影响因子:
--
作者:
Hamlin TA;van Beek B;Wolters LP;Bickelhaupt FM
通讯作者:
Bickelhaupt FM
影响因子:
4.4
作者:
REED, AE;WEINHOLD, F
通讯作者:
WEINHOLD, F
影响因子:
15
作者:
Row, R. David;Shih, Hui-Wen;Prescher, Jennifer A.
通讯作者:
Prescher, Jennifer A.
影响因子:
1.7
作者:
Guerra, CF;Snijders, JG;Baerends, EJ
通讯作者:
Baerends, EJ
影响因子:
3.6
作者:
BACHRACH, SM
通讯作者:
BACHRACH, SM